Motion of magnetic elements at the solar equator observed by SDO/HMI
Abstract
Characterizing motions of the solar magnetic field near the solar equator is important for understanding the symmetry and asymmetry of large scale structures in the solar interior, solar corona, and solar wind. The SDO/HMI has been observing the full-disk solar magnetic field, with a cadence of 12 minutes or 45 seconds, since April 2010. With high-cadence long-term observations of the solar photospheric magnetic field, we analyze the motion of the magnetic field elements, specifically latitudinal motion, near the solar equator. The regions that are divergent, convergent or cross-equatorial and appear, in general, to be coherent on a spatial scale of ~15 degrees longitude and last for several days.
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2012
- Bibcode:
- 2012AGUFMSH41D2129H
- Keywords:
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- 2134 INTERPLANETARY PHYSICS / Interplanetary magnetic fields;
- 7509 SOLAR PHYSICS;
- ASTROPHYSICS;
- AND ASTRONOMY / Corona;
- 7524 SOLAR PHYSICS;
- ASTROPHYSICS;
- AND ASTRONOMY / Magnetic fields;
- 7529 SOLAR PHYSICS;
- ASTROPHYSICS;
- AND ASTRONOMY / Photosphere